This image shows the internal components of a BTE (behind-the-ear) model. In-ear (ITE) and in-the-canal (ITC) hearing aids were introduced in the late 1950s and early 1960s, and even smaller all-in-the-canal (CIC) hearing aids entered the market in the 1980s and 1990s. The ear trumpet was invented in the 17th century and is considered the first device used to help people with hearing impairment. These trumpets came in various shapes and sizes and were made of everything from iron plates to animal horns.
The era of digitalization would allow hearing aids to become smaller and more powerful. Starting in the 1960s, we would see hybrid devices that still depended on analog functions. Just a decade later, the creation of the microprocessor turned hearing aids into mini-computers. From then on, hearing aid technology would evolve rapidly.
The earliest known hearing aids date back to the 17th and 18th centuries. They were horn-shaped and made of shells, glass or wood. These auditory “trumpets” were used by people with hearing problems by attaching them to the ear to amplify sounds. In the 19th century, it became more common for these trumpets to be made of metals such as copper and brass.
Also during this century, efforts to hide these hearing aids began by incorporating them into hats, necklaces, bulky hairstyles, beards or even clothing. Another invention of the 19th century that was not as common as the trumpet was an ear tube. The ear tubes consisted of a tube that was attached to the speaker's mouth and then the other end was placed directly into the person's ear, thus eliminating ambient noise. Starting in the 1920s, hearing aids with vacuum tubes could increase the sound level up to 70 dB.
Rein also sold hearing aids and talking tubes, devices that helped amplify sounds while remaining portable. This progenitor of all modern hearing aids used a carbon transmitter so that the device could be portable. With the advent of World War II, the development of hearing aids took a backseat due to the scale of that conflict, however, the technological progress made by the various armies that participated in that war was nevertheless an important factor in the continuous development of audio assistive devices. By 1924, the size of the vacuum tube hearing aids had been reduced so that all components could fit into a small wooden box, with a receiver that the user attached to the ear.
Alexander Graham Bell, the creator of the first handy phone, also turned his hands more than capable to invent aids for the deaf. After reaching this conclusion, the first all-transistor hearing aids were offered in 1952, called Microtone Transimatic and Maico Transist-ear. The invention of the carbon microphone, transmitters, the digital signal processing chip or DSP and the development of computer technology helped transform the hearing aid into its current form. The standard modern hearing aid has a microphone, an amplifier for increasing the volume of sound and a receiver for transmitting sound to the ear canal.
According to the New York Times, his hearing loss would have started in the 1930s, when a gun was fired very close to his right ear. Doctors and scientists throughout history have come up with some creative, interesting and useful breakthroughs to help people throughout history with their hearing. Despite the advances, the world was still waiting for small, one-piece hearing aids that could fit completely in the ear and would actually be worn discreetly. Then, in 1912, the Globe Ear-Phone Company introduced the first volume control for a hearing aid, before the difficulties of World War I took their toll and a period characterized by lack of invention began.
There were even crescent-shaped headphones with a receiver hidden under the chin and earphones that reached up to the ears. .